21436000950 has 384 divisors, whose sum is σ = 68195635200. Its totient is φ = 4335690240.

The previous prime is 21436000903. The next prime is 21436000973. The reversal of 21436000950 is 5900063412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 34629741 + ... + 34630359.

It is an arithmetic number, because the mean of its divisors is an integer number (177592800).

Almost surely, 2^21436000950 is an apocalyptic number.

21436000950 is the 78260-th nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21436000950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34097817600).

21436000950 is an abundant number, since it is smaller than the sum of its proper divisors (46759634250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21436000950 is a wasteful number, since it uses less digits than its factorization.

21436000950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 21436000950 in words is "twenty-one billion, four hundred thirty-six million, nine hundred fifty", and thus it is an aban number.